STEAMYDATA

Cosmoteer: Starship Architect & Commander — patch notes and updates

Stored observation / content update:

Dated developer announcements recorded from Steam. Open the source for the complete update.

UpdateDateExcerpt / source
Hotfix 0.30.4a Patch Notes2026-04-20Bugfix: The game would sometimes load forever while jumping to a new star system. When updating an existing Steam Workshop item, the name, description, and preview image will no longer be updated unless you specially check a box to do so.
Update 0.30.4 - Ironman Mode, Balance Changes, New Ships, & Bug Fixes2026-04-17Cosmoteer update 0.30.4 is now available! This is a small update that adds "Ironman Mode" to Career, adds new ships, improves balance, and fixes bugs.Enjoy!Patch Notes: Balance: Small Shield (Overclocked): 'Extended' health reduced (15000->12000) 'Reinforced' health increased (30000->39000) Flak (Overclocked): Reduced shrapnel cloud health (800->400) Reduced shrapnel cloud lifetime (7s->4s) Reasoning: Overclocked Flak were too cost-effective at blocking damage. Ion Beam Emitter: Increased battery capacity (10->16) Reasoning: Overclocked Ion Beams were too difficult to sustain. Thermal Resonance Lance: Reduced turret speed (60->30) Reasoning:
Release Candidate 0.30.4 - Ironman Mode, Balance Changes, New Ships, & Bug Fixes2026-04-11Cosmoteer release candidate 0.30.4 is now available for testing! (To play this release candidate, you must opt in to test it. Please see this post for info on how to test release candidates.)This release candidate adds "Ironman Mode" to Career, adds new ships, improves balance, and fixes bugs.Thanks for testing!RC1 Patch Notes: Balance: Small Shield (Overclocked): 'Extended' health reduced (15000->12000) 'Reinforced' health increased (30000->39000) Flak (Overclocked): Reduced shrapnel cloud health (800->400) Reduced shrapnel cloud lifetime (7s->4s) Reasoning: Overclocked Flak were too cost-effective at blocking damage. Ion Beam Emitter: Incre
Hotfix 0.30.3d Patch Notes2026-02-11Bugfix: In single-player, detonating an Explosive Charge while hovering another part would crash the game.
Hotfix 0.30.3c Patch Notes2026-02-05Crash when overclocked shields receive negative damage. Possible freeze when placing parts that change heat build stats. Explosions that split ships could cause common multiplayer desyncs and inconsistent damage.
Heretic Red Demo2026-01-14Hey Cosmoteers!My friend has just released a free demo for their game Heretic Red, which is a narrative-driven detective mystery game that's set in a snowy village with murder, blasphemy, and religious tension. I played the demo myself and really enjoyed it, especially the world-building and dialogue. Here's a trailer:I know that's basically nothing like Cosmoteer, but if it sounds like something you might enjoy, then I encourage you to check it out! The demo takes under an hour to play and is of course free. And if you like it, then please wishlist so that you get notified when the full game releases!- Walt
Hotfix 0.30.3b Patch Notes2025-12-17Bugfix: Mods whose /Actions list used inheritance would usually crash on load.
Hotfix 0.30.3a Patch Notes2025-12-16Bugfix: Crash when booting the game on a computer that doesn't have a settings file saved yet.
Update 0.30.3 - Quality-of-Life, Balance, & Bug Fixes2025-12-15Cosmoteer update 0.30.3 is now available! This is a small update that makes quality-of-life improvements, adds new ships, improves balance, and fixes bugs.Enjoy!Patch Notes:Built-In Ships:Added 4 new Fringe combat ships: Hotshot, Scorcher, Smoulderer, and Stoker.Added 11 new Cabal combat ships: Adustio, Antares, Heliogabalus, Helios, Ignis Castus, Ignis Excaecator, Ignis Immanis, Ignis Iustus, Ignis Nitidus, Ignis Primus, and Ignis Recensus.Added 4 new Imperium combat ships: Alicanto, Ashoka, Aspatha, and Mithridates.Added 5 new Great House Io combat ships: Lerna, Sabnock, Sargus, Vapula, and Zent.Misc updates to existing ships.Balance:Point
Release Candidate 0.30.3 - Quality-of-Life, Balance, & Bug Fixes2025-11-29Cosmoteer release candidate 0.30.3 is now available for testing! (To play this release candidate, you must opt in to test it. Please see this post for info on how to test release candidates.)This release candidate makes quality-of-life improvements, adds new ships, improves balance, and fixes bugs.Thanks for testing!RC1 Patch Notes:Built-In Ships:Added 4 new Fringe combat ships: Hotshot, Scorcher, Smoulderer, and Stoker.Added 11 new Cabal combat ships: Adustio, Antares, Heliogabalus, Helios, Ignis Castus, Ignis Excaecator, Ignis Immanis, Ignis Iustus, Ignis Nitidus, Ignis Primus, and Ignis Recensus.Added 4 new Imperium combat ships: Alicanto,
Hotfix 0.30.2b Patch Notes2025-11-12Fixed overclocked railgun splitting projectiles causing lag/stutter.
Hotfix 0.30.2a Patch Notes2025-11-06Fixed frequent desyncs during gameplay, especially during ship construction.
Update 0.30.2 - Quality of Life & Bug Fixes2025-11-05Cosmoteer update 0.30.2 is now available! This update tweaks the new sound effects in response to player feedback (thanks!!), makes quality-of-life improvements, adds new ships, improves balance, and fixes bugs.Enjoy!Patch Notes:Built-In Ships:Added 20 new Great House Io combat ships: Aamon, Amy, Ananke, Andrealphus, Caligaris, Cetus, Charybdis, Clio, Decarabia, Furfur, Ianthe, Janus, Lernean, Lysithea, Murmur, Paimon, Surtr, Vesta, Vestarka, and Vine.Added 1 new Fringe ship: Gehenna.Miscellaneous updates to existing built-in ships.Balance:Overclocked Flak:Shrapnel fields will now repel each other and thus not overlap as much.Shrapnel fields
Release Candidate 0.30.2 - Quality-of-Life & Bug Fixes2025-10-18Cosmoteer release candidate 0.30.2 is now available for testing! (To play this release candidate, you must opt in to test it. Please see this post for info on how to test release candidates.)This is a release candidate tweaks the new sound effects in response to player feedback (thanks!!), makes quality-of-life improvements, adds new ships, improves balance, and fixes bugs.Thanks for testing!RC1 Patch Notes:Built-In Ships:Added 20 new Great House Io combat ships: Aamon, Amy, Ananke, Andrealphus, Caligaris, Cetus, Charybdis, Clio, Decarabia, Furfur, Ianthe, Janus, Lernean, Lysithea, Murmur, Paimon, Surtr, Vesta, Vestarka, and Vine.Added 1 new
Hotfix 0.30.1b Patch Notes2025-09-16Modding: Re-added the 'ElementDeliver' common sound effects, because its removal was causing mods to crash. Bugfix: Rare crash when opening the galaxy map with some galaxy seeds.
Hotfix 0.30.1a Patch Notes2025-09-10Fixed an issue causing incompatibility with some mods.
Update 0.30.1 - New Sound Effects & More!2025-09-09Cosmoteer update 0.30.1 is now available! This update has new audio effects, new ships, balance tweaks, quality-of-life improvements, and bug fixes.Enjoy!Patch Notes:Built-In Ships:Added 2 new Monolith combat ships: Justicar, Perfect Blue.Added 3 new Cabal ships: Delphinus, Lyra Major, Lyra Minor.Added 2 new Imperium combat ships: Canary, Nero.Added 25 new Great House Io combat ships: Abaddon, Acala, Allocer, Amalthea, Andromalius, Catoblepas, Crocell, Cyllene, Dantalion, Donor, Enyo, Euboea, Gremory, Lei-zi, Masubi, Quzah, Raum, Sobo, Sparagmos, Themisto, Tiresias, Tonatiuh, Tsui, Uta, Zaebos.Miscellaneous updates to existing built-in ships.
Hotfix 0.30.0e Patch Notes2025-09-01Bugfix: Missile Launchers set to any type other than H.E. would lose their loaded missile parts after loading a saved game. Bugfix: Overclocked Deck Cannons had their reload timers reset after loading a saved game.
Release Candidate 0.30.1 - New Sound Effects & Quality-of-Life2025-08-22Cosmoteer release candidate 0.30.1 is now available for testing! (To play this release candidate, you must opt in to test it. Please see this post for info on how to test release candidates.)This is a release candidate contains a ton new sound effects, plus it's got a handful of the usual assortment of new ships, balance tweaks, quality-of-life improvements, and bug fixes.Thanks for testing!RC1 Patch Notes:Built-In Ships:Added 2 new Monolith combat ships: Justicar, Perfect Blue.Added 3 new Cabal ships: Delphinus, Lyra Major, Lyra Minor.Added 2 new Imperium combat ships: Canary, Nero.Added 25 new Great House Io combat ships: Abaddon, Acala, Al
Hotfix 0.30.0d Patch Notes2025-08-22Saved game files containing ships that were under construction and had overclocked parts could sometimes fail to load. Mod files with names in the format 'mod_*.rules' will no longer be considered if they don't contain a 'CompatibleGameVersions'.